package com.atguigu.gmall.item.controller;

import com.alibaba.fastjson.JSONObject;
import com.atguigu.gmall.list.client.ListFeignClient;
import com.atguigu.gmall.model.product.BaseCategoryView;
import com.atguigu.gmall.model.product.SkuInfo;
import com.atguigu.gmall.model.product.SpuSaleAttr;
import com.atguigu.gmall.product.client.ProductFeignClient;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import java.math.BigDecimal;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.ThreadPoolExecutor;

/**
 * @Author: 李旭
 * @Time: 10:38
 * @Description:
 */
@RestController
@RequestMapping("/api/item")
public class ItemApiController {


    @Autowired
    private ProductFeignClient productFeignClient;
    @Autowired
    private ThreadPoolExecutor threadPoolExecutor;
    @Autowired
    private ListFeignClient listFeignClient;

    //数据汇总  页面所需要的 4部分数据
    @GetMapping("/getItem/{skuId}")
    public Map<String, Object> getItem(@PathVariable Long skuId) {
        Map<String, Object> result = new HashMap<>();
        //1、skuInfo  库存信息 SkuInfo图片
        CompletableFuture<SkuInfo> skuInfoCompletableFuture = CompletableFuture.supplyAsync(() -> {
            SkuInfo skuInfo = productFeignClient.getSkuInfo(skuId);
            result.put("skuInfo", skuInfo);
            return skuInfo;
        }, threadPoolExecutor);
        //2、一二三级分类
        CompletableFuture<Void> categoryViewCompletableFuture = skuInfoCompletableFuture.thenAcceptAsync(skuInfo -> {
            BaseCategoryView baseCategoryView = productFeignClient.
                    getBaseCategoryView(skuInfo.getCategory3Id());
            result.put("categoryView", baseCategoryView);
        }, threadPoolExecutor);
        //3、销售属性及值及选中红边框
        CompletableFuture<Void> spuSaleAttrListCompletableFuture = skuInfoCompletableFuture.thenAcceptAsync(skuInfo -> {
            List<SpuSaleAttr> spuSaleAttrValueChecked = productFeignClient.
                    getSpuSaleAttrValueChecked(skuInfo.getId(), skuInfo.getSpuId());
            result.put("spuSaleAttrList", spuSaleAttrValueChecked);
        }, threadPoolExecutor);
        //4、销售属性值组合对应库存ID    入参：商品ID spuId
        CompletableFuture<Void> valuesSkuJson1CompletableFuture = skuInfoCompletableFuture.thenAcceptAsync(skuInfo -> {
            Map valuesSkuJson = productFeignClient.
                    getValuesSkuJson(skuInfo.getSpuId());
            result.put("valuesSkuJson", JSONObject.toJSONString(valuesSkuJson));
        }, threadPoolExecutor);
        //5:单独价格
        CompletableFuture priceCompletableFuture = CompletableFuture.runAsync(() -> {
            BigDecimal price = productFeignClient.getPrice(skuId);
            result.put("price", price);
        }, threadPoolExecutor);

        //6：增加热度分
        CompletableFuture.runAsync(() -> {
            listFeignClient.hotScore(skuId);
        }, threadPoolExecutor);

        //等待所有多线程执行完成
        CompletableFuture.allOf(categoryViewCompletableFuture,spuSaleAttrListCompletableFuture,
                valuesSkuJson1CompletableFuture,priceCompletableFuture).join();
        return result;
    }
}
